Command Zero is a cybersecurity investigation platform designed to address the 'Last Mile' of Security Operations. It provides autonomous and user-led cyber investigations to complement security operations teams. The platform aims to streamline the process of reviewing escalated cases, investigating historical and current context, and determining the severity and criticality of security incidents. Command Zero incorporates expert knowledge, processes, and tools to assist analysts in conducting comprehensive investigations, expanding on autonomous sequences, and performing bespoke user-led inquiries.